EGGS: Eggs are laid singly in punctures in the leaf epidermis. There is no preference for upper or lower surface. The freshly laid eggs are creamy white and shaped like an elongated oval. The eggs are small, 1/100 inch in length, and hatch 2-4 days.
LARVAE: The maggots are bright yellow to yellow green in color, measuring 1/6 inch in length and 1/50 inch in breadth. There are three larval stages. Each larval instar is completed in 2 - 3 days.
PUPAE: The pupal stage is yellow-brown in color and distinctly segmented. Pupae are rectangular oval shaped narrowing at the ends. This stage does no feeding damage and development is completed in 5 to 12 days.
ADULTS: This adult is a small fly of mat gray with black and yellow splotches and about 1/12 inch of length. Adults live for 10-20 days depending on environmental conditions.